Cisco Cisco IPS 4255 Sensor
4
Release Notes for Cisco Intrusion Prevention System 7.0(1)E3
OL-18483-01
ROMMON and TFTP
ROMMON and TFTP
ROMMON uses TFTP to download an image and launch it. TFTP does not address network issues such
as latency or error recovery. It does implement a limited packet integrity check so that packets arriving
in sequence with the correct integrity value have an extremely low probability of error. But TFTP does
not offer pipelining so the total transfer time is equal to the number of packets to be transferred times
the network average RTT. Because of this limitation, we recommend that the TFTP server be located on
the same LAN segment as the sensor. Any network with an RTT less than a 100 milliseconds should
provide reliable delivery of the image. Be aware that some TFTP servers limit the maximum file size that
can be transferred to ~32 MB.
as latency or error recovery. It does implement a limited packet integrity check so that packets arriving
in sequence with the correct integrity value have an extremely low probability of error. But TFTP does
not offer pipelining so the total transfer time is equal to the number of packets to be transferred times
the network average RTT. Because of this limitation, we recommend that the TFTP server be located on
the same LAN segment as the sensor. Any network with an RTT less than a 100 milliseconds should
provide reliable delivery of the image. Be aware that some TFTP servers limit the maximum file size that
can be transferred to ~32 MB.
For More Information
•
For the procedure for downloading IPS software updates from Cisco.com, see
.
•
For the procedure for configuring automatic updates, for the CLI refer to
for the IDM refer to
the IME refer to
IPS Management and Event Viewers
Note
IDM 7.0.1 is included within IME 7.0.1. You can use IME 7.0.1 to configure IPS 6.1, 6.2, and 7.0
sensors.
sensors.
Note
IME 7.0.1 now supports 10 devices.
Use the following tools for configuring Cisco IPS 7.0(1) sensors:
•
Cisco IDM 7.0.1
•
Cisco IME 7.0.1
•
IPS CLI 7.0
•
ASDM 5.2 and later
•
CSM 3.2
Use the following tools for monitoring Cisco IPS 7.0(1) sensors:
•
Cisco IME 7.0.1
•
CSM 4.0 and later
Note
You may need to configure viewers that are already configured to monitor the Cisco IPS 6.2
sensors to accept a new SSL certificate for the Cisco IPS 7.0(1) sensors.
sensors to accept a new SSL certificate for the Cisco IPS 7.0(1) sensors.